Convert 75 g of KMnO4 to molecules of KMnO4

What is the polyatamic ion of borate

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false

Butane gas reacts with oxygen gas to give carbon dioxide gas and water vapor (gas). if you mix butane and oxygen in the correct stoichiometric ratio, and if the total pressure of the mixture is 390 mmhg, what is the pressure (in mmhg) of water vapor after the reaction is completed (temperature and volume do not change).